[MacPorts] #55800: libvpx 1.7.0_0 build fails: error: assigning to '__m512i' (vector of 8 'long long' values) from incompatible type 'int'

[MacPorts]

#55800: libvpx 1.7.0_0 build fails: error: assigning to '__m512i' (vector of 8
'long long' values) from incompatible type 'int'
----------------------------+-------------------
  Reporter:  laughingtiger  |      Owner:
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.4.2
Resolution:                 |   Keywords:
      Port:  libvpx         |
----------------------------+-------------------

Comment (by ballapete):

 I see the same failure on El Capitan, OS X 10.11.6. Here I see one more
 report:

 {{{
 vpx_dsp/x86/sad4d_avx512.c:27:14: warning: implicit declaration of
 function '_mm512_set1_epi16' is invalid in C99 [-Wimplicit-function-
 declaration]
   sum_ref0 = _mm512_set1_epi16(0);
              ^
 }}}

 The code is:

 {{{
    23     ref0 = ref[0];
    24     ref1 = ref[1];
    25     ref2 = ref[2];
    26     ref3 = ref[3];
    27     sum_ref0 = _mm512_set1_epi16(0);
    28     sum_ref1 = _mm512_set1_epi16(0);
    29     sum_ref2 = _mm512_set1_epi16(0);
    30     sum_ref3 = _mm512_set1_epi16(0);
 }}}

 Either someone mixed up brackets or this function  `_mm512_set1_epi16()`
 does not exist. The latter sounds more plausible: find only finds the
 string `_mm512_set1_epi16` *used* on these four mentioned lines. This
 looks like the actual cause for the failure.

--
Ticket URL: <https://trac.macports.org/ticket/55800#comment:5>
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